The Davidson family have three healthy children thanks to the wonders of IVF. Sure their family was complete at the time they generously donate one of their unused embryos to a childless couple. But life can sometimes turn out differently than we expect. To their shock (and joy) Jessica and Matt conceive another child naturally, a son named Eeny. Tragically though he has a congenital illness that steals him away at age two. While they are still coming to terms with this loss Jessica comes across the woman she donated the embryo to at the primary school her kids attend and there in front of her is “her” daughter Mia.